INTERSTOR® Indirect Water Heaters are built from high-grade stainless steel for exceptional durability and corrosion resistance. Precision welding, stainless steel tank connections, and a full pickling and passivation process enhance long-term reliability. Compared to glass-lined models, stainless steel offers a significantly longer lifespan for domestic water heating and storage.

PERFORMANCE The extended surface area of our stainless steel heat exchanger results in superior DHW performance, producing 2-3 times more hot water than a standard gas fired water heater.

ECONOMY Unlike direct-fired units, INTERSTOR® Indirect Water Heaters integrate with your existing boiler to deliver reliable, on-demand hot water. They match the efficiency of your home’s space heating system for consistent performance and energy savings.

• Delivers more hot water than standard direct fired tanks when paired with high efficiency boilers

• Stainless steel construction including pickled and passivated tank, water connections and high-capacity smooth wall coil resist corrosion for long-life

• Top DHW connections and side boiler connections increase install efficiency while saving time, money, and labor (DTI 40, 55 and 65)

• Lightweight for easy installation

• 2” of polystyrene foam insulation for an extremely low standby heat loss

• Removable inspection port for easy access to coil and tank

• Standard Aquastat & 10KΩ temperature sensor